Following is a link to a TN Bill of Sale that I have used in the past. I don't think that it has a place for a Notary Signature, and I have never had a Notary witness any of my transactions in the past.
http://home.comcast.net/~jlambros/Misc/TN%20Bill%20of%20Sale.pdfThat having been said...(this is the part where I protect myself from any Democrat lawyers lurking in the sewer), I would recommend that you check with the TN Department of Transportation to make certain what laws apply in the state of TN.